From b062e0f2abc189f352e019bac6854f469e9dfc8c Mon Sep 17 00:00:00 2001
From: Tom van der Lee <tom@vanderlee.io>
Date: Fri, 3 Dec 2021 14:15:14 +0100
Subject: Added tests

---
 aoc/__init__.py  |  6 +++++-
 aoc/__main__.py  |  3 +--
 aoc/test_init.py |  2 ++
 conftest.py      | 35 +++++++++++++++++++++++++++++++++++
 day1/__init__.py |  4 ++++
 day2/__init__.py |  4 ++++
 requirements.txt |  2 ++
 7 files changed, 53 insertions(+), 3 deletions(-)
 create mode 100644 aoc/test_init.py
 create mode 100644 conftest.py
 create mode 100644 requirements.txt

diff --git a/aoc/__init__.py b/aoc/__init__.py
index 07a5fe7..b13489c 100644
--- a/aoc/__init__.py
+++ b/aoc/__init__.py
@@ -4,9 +4,13 @@ from typing import Generator, Any, Iterator
 
 
 class BaseAssignment(ABC):
+    example_result = NotImplemented
     def __init__(self, path):
         self.path = path
 
+    def __str__(self):
+        return f'{self.__module__}.{self.__class__.__name__}'
+
     def parse_item(self, item: str) -> Any:
         return item
 
@@ -20,4 +24,4 @@ class BaseAssignment(ABC):
                 yield self.parse_item(line.strip())
 
     def run(self, input: Iterator) -> Any:
-        raise NotImplementedError('Please implement run')
+        raise NotImplementedError('Please implement run')
\ No newline at end of file
diff --git a/aoc/__main__.py b/aoc/__main__.py
index efb215d..6dffd61 100644
--- a/aoc/__main__.py
+++ b/aoc/__main__.py
@@ -1,8 +1,7 @@
 import argparse
 import os
-import sys
 import importlib
-from typing import Tuple, List
+from typing import List
 
 
 def day(assignment_part: str) -> str:
diff --git a/aoc/test_init.py b/aoc/test_init.py
new file mode 100644
index 0000000..8524086
--- /dev/null
+++ b/aoc/test_init.py
@@ -0,0 +1,2 @@
+def test_assingment_examples(assignment):
+    assert assignment.run(input=assignment.read_input(example=True)) == assignment.example_result
diff --git a/conftest.py b/conftest.py
new file mode 100644
index 0000000..3bae1e2
--- /dev/null
+++ b/conftest.py
@@ -0,0 +1,35 @@
+import importlib
+import os
+from pkgutil import walk_packages
+
+from _pytest.python import Metafunc
+
+from aoc.__main__ import day
+
+dir_path = os.path.dirname(os.path.realpath(__file__))
+
+def pytest_generate_tests(metafunc: Metafunc):
+    if 'assignment' in metafunc.fixturenames:
+        packages = [
+            importlib.import_module(package.name)
+            for package
+            in walk_packages([dir_path])
+            if package.name.startswith('day')
+        ]
+
+        assignments = [
+            (getattr(package, f'Assignment{day(part)}'), package)
+            for package in packages
+            for part in ['1', '2']
+        ]
+
+        metafunc.parametrize(
+            argnames=f'assignment',
+            argvalues=[
+                Assignment(path=package.__path__[0])
+                for (Assignment, package)
+                in assignments
+                if Assignment is not None
+            ],
+            ids=lambda assignment: str(assignment)
+        )
diff --git a/day1/__init__.py b/day1/__init__.py
index bc44089..be17935 100644
--- a/day1/__init__.py
+++ b/day1/__init__.py
@@ -11,6 +11,8 @@ class Assignment(BaseAssignment):
         return list(super().read_input(example))
 
 class AssignmentOne(Assignment):
+    example_result = 7
+
     def run(self, input: List) -> int:
         result = 0
 
@@ -21,6 +23,8 @@ class AssignmentOne(Assignment):
 
 
 class AssignmentTwo(Assignment):
+    example_result = 5
+
     def run(self, input: List) -> int:
         new_input = [
             input[i - 2] + input[i - 1] + input[i]
diff --git a/day2/__init__.py b/day2/__init__.py
index 14229a9..d99a0be 100644
--- a/day2/__init__.py
+++ b/day2/__init__.py
@@ -17,6 +17,8 @@ class Assignment(BaseAssignment):
         return list(super().read_input(example))
 
 class AssignmentOne(Assignment):
+    example_result = 150
+
     depth = 0
     horizontal = 0
 
@@ -34,6 +36,8 @@ class AssignmentOne(Assignment):
 
 
 class AssignmentTwo(Assignment):
+    example_result = 900
+
     aim = 0
     depth = 0
     horizontal = 0
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..49ec960
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+pytest
+coverage
-- 
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